Códigos cíclicos lineares com dual complementar sobre anéis finitos de característica ímpar

Abstract

In this work, we investigate cyclic codes in a finite non-chain ring $R=\mathbb{F}_q[x]/(x^2-1)$. Denoting by $v$ the class of $x$ in this quotient, we have $R=\mathbb{F}_q+v\mathbb{F}_q$, where $v^2 = 1$. We establish sufficient and necessary conditions for a code over $R$ to be considered a linear code with dual complement (LCD). Furthermore, we explore the properties of the dual code and its relationship with LCD codes. We demonstrate that the Gray map of an LCD code of length $n$ in $\mathbb{F}_q+v\mathbb{F}_q$ results in an LCD code of length $2n$ in $\mathbb{F}_q^{2n}$, and other properties of them